Improvement in steam-tbaps



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IMPROVEMENT IN STEAM-Tartes.

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4TO ALL PERSONS TO WHOM THESEIRESENTS SHALLCOME:

Be it known that I, RICHARD CQLBURN, of Norwich, in the county of New London, and State of Connecticut, have invented an impr'oved Steam-Trap or apparatus to be applied to the cylinder of a steam engine for the purpose of freeing it of condensed steam andits piston from back pressure of exhaust steam and I dohereby l declare the said invention'to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure 1 exhibits a longitudinal section of acylindcr and its piston with my invention applied to the cylinder at or near each end thereof.

vFigure 2 will be hereinafter referred to and described. A

My present, invention is designed to accomplish the objects or purposes of that for' which Letters Patent l were granted 'to Vmyself' and H. W. Hanson on May 20. 1856, and subsequently reissued on the Fith day of February, 1865. With myl present invention I have means by which the valve, or both of them, when in conjunction with the cylinder, can be kept open or off their seat or seats, in order that, at the starting of the engine, any condensed steam or Swater in the cylinder may be quickly and thoroughly blown oil` or discharged therefrom. Furthermore, the valve of my said apparatus is so arranged with respect to its seat and induction and eduction passages that it will close under pressure of the steam, and, when relieved therefrom, wiliopen or fallaway from its seatby its own weight or gravity. I

. In the drawing, A denotes the steamengine cylinder, and B its piston. The trap at each end of and beneath the cylinder is shown at C. The valve a of the trap is placed within a chamber, b, having the valveseat cat its top, and a. hole or passage, d, leading through the seat. The valve plays freelyin vertical directionswithin the chamber, and, when inits lowestposition, rests on a hollow Ortubular projection, c, having one or more holes f formed laterally on it. The cylinder is connected with the valve-chamber by means of a. conduit or passage, g, opening'out of the cylinder and into the lower part ofthe valve-chamber. Over the valveseat is a chamber, h, out of which an eduotion passage or conduit, z', leads. The valve-chamber, valve, the seat of the valve, and the induction and @duction passages are arranged in, a block or case, through whose top Ic (which also constitutes the top of the chamber h) a. screw, l, is screwed. The shank m of the screw goes into the opening d of the Ivalve-seat; and, when. the screw is screwed down,iit will operate to prevent the valve from coming in contact with its seat. The diameter of the shank of the screw is less than that of the hole d, in order that there may be a free passage for waterto escape through the hole and around the shank. The valve I make with a' series of wings, m m m m, extending from it, in manner as represented in tigfl, and also in iig. 2, which is a transverse and horizontal section. of theA trap. These wings, by bearing against thesides of the valvechamber, serve to guide the valve in its vertical movements. The spacesbetween the wings allow the water to pass through the valve-chamber.

When the steam is admitted into either end'of the cylinder, in 4order to impel the piston in one direction, it

will enter the valve-chamber in connection with such end, and will force upward and close the valve thereof upon its seat; but when thesteam enters the cylinder, .in order-to impel the piston in the opposite direction,

the' valve, in consequence of the exhaust of the steam, will be free to fall 4away from its seat,'and its weight willicause it to do so. The waste, water or condensed steamwill then be free to discharge through and out of the valve-chamber and the passage through the valve-sent, and into the chamber h, and thence through the eduction passage. I would remark that I intend to apply lto each screw lof the pair of traps of a cylinder a crank-arm or lever, to extend from the head of the screws; also, to connect these arms by a rod or bar, so as to enable both screws to be operated or moved simultaneously. A

'I 'do not claim the combination of two steam-traps with a cylinder and piston; nor do I herein claim the invention as des'cribe'dand claimed in the patent hereinbefore mentioned: What I claim as my present invcntionyisfi e AThe arrangement of the valve, its case, and induction and eduction passages substantially in manner as described, in order that the valve, when in use with aV cylinder and piston as explained, will be closed by the pressure of steam, and, when. relieved therefrom, will be opened by its own weight, the whole being in manner and under circumstances as explained. i

I also claim .the combination of the screw l, or its equivalent, 4with the valve, it'sseat. chamber, and induction and eduction passages, arranged Ysubstantially as specified. Y RICHARD CQLBURN.

Witnesses:

" R. EDDY,

.F. P. HALE, Jr.` 

